Lift handles having safety interlocks for a rack-mounted enclosure

ABSTRACT

According to one embodiment, a system includes an enclosure configured to be removable from a rack system, the enclosure including at least one bay for insertion of a component therein, a horizontally-oriented upper wall, a horizontally-oriented lower wall, two vertically-oriented sidewalls coupled to the upper and lower walls, and a set of integrated handles, each handle being configured to transition from a recessed position to an extended position, and each handle being configured to be gripped by a hand when in the extended position, wherein each handle is configured to extend higher than the upper wall of the enclosure when in the extended position, and wherein each handle is configured to retract to within an outer profile of the enclosure when in the recessed position. Each handle is configured to rotate 180° from the recessed position to the extended position.

BACKGROUND

The present invention relates to information technology (IT) systems,and more particularly, to lift handles having safety interlocks for arack-mounted enclosure.

Lift handles for rack-mounted IT equipment, such as servers and storageenclosures, are often located on sides of the equipment. While thisprovides an installer acceptable access to the handles, thisconfiguration also provides several disadvantages.

Side handles that are used in the industry are sometimes removable withsome latching features, or permanent which rotate from sides of theequipment. Removable handles are difficult to use because they force theinstaller to hold the weight of the system while removing the handleprior to the equipment being capable of sliding into the rack. Also,removable handles may be lost prior to the equipment being removed fromthe rack, which makes removal more difficult or impossible.

Permanently attached rotating handles always stay with the equipment;however, they also produce problems when the system has to be slid backinto a rack on fixed rails. When the system is slid back into the rack,the location of the handles to the side of the chassis may cause thehands of the installer to contact the rack door or the front edge of therack during installation, which may be quite painful for the installerand/or cause the installer to lose control of the equipment, which maylead to damage to the equipment. Additionally, the handles are alwaysavailable to an installer, regardless of whether the installer shouldutilize the handles or not to lift the equipment, for example when theequipment is too heavy to be lifted safely with the handles.

SUMMARY

According to one embodiment, a system includes an enclosure configuredto be removable from a rack system, the enclosure including at least onebay for insertion of a component therein, a horizontally-oriented upperwall, a horizontally-oriented lower wall, two vertically-orientedsidewalls coupled to the upper and lower walls, and a set of integratedhandles, each handle being configured to transition from a recessedposition to an extended position, and each handle being configured to begripped by a hand when in the extended position, wherein each handle isconfigured to extend higher than the upper wall of the enclosure when inthe extended position. Each handle is configured to retract to within anouter profile of the enclosure when in the recessed position. Eachhandle is configured to rotate 180° from the recessed position to theextended position.

Other aspects and embodiments of the present invention will becomeapparent from the following detailed description, which, when taken inconjunction with the drawings, illustrates by way of example theprinciples of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic of a system having an enclosure with anintegrated set of lift handles, in accordance with one embodiment.

FIG. 2 shows a side view of a handle transitioning from a recessedposition to an extended position, in accordance with one embodiment.

FIG. 3A shows an isometric view of a handle transitioning from arecessed position to an extended position, in accordance with oneembodiment.

FIG. 3B shows a side view of a handle transitioning from a recessedposition to an extended position, in accordance with one embodiment.

FIG. 3C shows an isometric view of a handle transitioning from arecessed position to an extended position, in accordance with oneembodiment.

FIG. 4A shows a partial view of an enclosure having an interlock system,according to one embodiment.

FIG. 4B shows a partial view of an enclosure having an interlock system,according to one embodiment.

FIGS. 5A-5C show a process for transitioning at least one of the handlesfrom a recessed position to an extended position in an enclosure havingan interlock system, according to one embodiment.

DETAILED DESCRIPTION

The following description is made for the purpose of illustrating thegeneral principles of the present invention and is not meant to limitthe inventive concepts claimed herein. Further, particular featuresdescribed herein can be used in combination with other describedfeatures in each of the various possible combinations and permutations.

Unless otherwise specifically defined herein, all terms are to be giventheir broadest possible interpretation including meanings implied fromthe specification as well as meanings understood by those skilled in theart and/or as defined in dictionaries, treatises, etc.

It must also be noted that, as used in the specification and theappended claims, the singular forms “a,” “an,” and “the” include pluralreferents unless otherwise specified.

In order to overcome the problems associated with conventionalinformation technology (IT) equipment, an improved handle system may beprovided that restricts the use of the handle system to only when it issafe to lift an enclosure and provides better placement of the handles.

According to one general embodiment, a system includes an enclosureconfigured to be removable from a rack system, the enclosure includingat least one bay for insertion of a component therein, ahorizontally-oriented upper wall, a horizontally-oriented lower wall,two vertically-oriented sidewalls coupled to the upper and lower walls,and a set of integrated handles, each handle being configured totransition from a recessed position to an extended position, and eachhandle being configured to be gripped by a hand when in the extendedposition, wherein each handle is configured to extend higher than theupper wall of the enclosure when in the extended position, and whereineach handle is configured to retract to within an outer profile of theenclosure when in the recessed position.

According to another general embodiment, an enclosure includes at leastone bay for insertion of a component therein, a horizontally-orientedupper wall, a horizontally-oriented lower wall, two vertically-orientedsidewalls coupled to the upper and lower walls, four integrated handles,each handle being located near corners of the upper wall of theenclosure and configured to transition from a recessed position to anextended position, one or more catches, each catch being associated withat least one of the handles and configured to release the one or moreassociated handles, and one or more interlocks, each interlock beingphysically configured to prevent transition of one or more handlesassociated therewith from the recessed position to the extended positionwhen a component is installed in at least one bay of the enclosure,wherein the at least one of the handles is restricted from transitioningfrom the recessed position to the extended position until the associatedcatch is engaged, wherein each handle is configured to be gripped by ahand when in the extended position, wherein two of the handles arepositioned within or on an exterior of each of the vertically-orientedsidewalls of the enclosure when in the recessed position, wherein eachhandle is configured to extend higher than the upper wall of theenclosure when in the extended position, and wherein each handle isconfigured to retract to within an outer profile of the enclosure whenin the recessed position.

Now referring to FIG. 1, a schematic diagram of a system 100 is shown,according to one embodiment. The system 100 comprises an enclosure 104or chassis. The enclosure 104 comprises at least one bay for insertionof a component 108 therein, a horizontally-oriented upper wall 112, ahorizontally-oriented lower wall 114, two vertically-oriented sidewalls116 coupled to the upper and lower walls, and a set of integrated lifthandles.

Each lift handle 102 is positioned where it can be accessed by aninstaller, such as toward a corner of the enclosure 104. Toward a cornerindicates as close to the corner of the upper surface of the enclosureas possible given design constraints, such as wall thickness, componentbay configurations, etc. Also, each handle 102 is configured to extendhigher than the upper wall 112 of the enclosure 104 when in the extendedposition. The set of integrated lift handles may include two handles102, four handles 102, or possibly more handles for enclosures 104 whichare designed for use with heavier components 108 and/or modules. A sethaving four handles 102 is a preferred embodiment, with each handle 102being located near to or as close to a corner of the enclosure 104 aspossible considering the design of the enclosure 104. By “near to” whatis meant is that the handle is positioned closer to the corner than to acenter of the wall on which it is placed.

Each handle 102 is collapsible, foldable, retractable, or in some otherway capable of being recessed into an outer profile of the enclosure 104when the enclosure 104 is to be mounted in a rack system 106 or someother suitable cabinet, system case, etc., e.g., each handle 102 isconfigured to retract to within an outer profile of the enclosure 104when the handle 102 is in the recessed position. Furthermore, in someapproaches, the handles 102 do not extend beyond side walls of theenclosure 104 such that the handles 102 are allowed to be in theextended position while the enclosure 104 is being installed into therack system 106. This is particularly useful when there are no otherdevices positioned above the one being installed so that the handles 102may be utilized to support the enclosure 104 during the installationprocess.

The outer profile of the enclosure 104 may be defined as a maximumpossible side-to-side width W and/or top-to-bottom height H of theenclosure 104 that allows for the enclosure 104 to fit into a stall orbay of the rack 106. In this way, it is not necessary that the handles102 completely retract from view and into the rack 106, but just thatthey are recessed sufficiently to allow insertion into the rack 106.

In one embodiment, four handles 102 are located near corners of theupper wall of the enclosure 104, with two handles 102 being positionedwithin or on an exterior of each of the vertically-oriented sidewalls ofthe enclosure 104 when in the recessed position.

In one embodiment, each handle 102 vertically-slide along an exteriorwall of the enclosure 104 such that it protrudes from a top of theenclosure 104 on sides thereof. In a further embodiment, the handles 102may be spring-loaded (or otherwise biased toward an extended position asopposed to a recessed position) such that releasing a catch 110 orrelease button causes one or more of the handles 102 in the set toextend from the recessed position (where the handles 102 are recessedinto the outer profile of the enclosure 104 for placement in the rack106) to the extended position (where the handles 102 may be used forlifting and positioning of the enclosure 104). The release button isconfigured to disengage a catch upon being depressed in order to releaseone or more corresponding handles 102.

Accordingly, the enclosure 104 may further include one or more catches110, each catch 110 being associated with at least one of the handles102 and configured to release the one or more associated handles 102.Furthermore, the one or more associated handles 102 are restricted fromtransitioning from the recessed position to the extended position untilthe associated catch 110 is disengaged, such as by pressing, sliding,pushing, pulling, or some other suitable action.

A handle 102 is restricted from transitioning from the recessed positionto the extended position until an associated catch 110 is disengaged inone embodiment. When the handles 102 are spring-loaded, they may bepressed back into the recessed position through physical force thereonin a direction toward the enclosure 104, which is an opposite directionfrom which they extended from the enclosure 104. In another embodiment,when the handles 102 are in the extended position, they may be pressedback into the recessed position through physical force thereon in adirection opposite a direction in which they moved to extend, such as byflipping them back, rotating them back, etc., depending on how thehandles 102 were extended.

In one embodiment, each handle 102 may have a catch 110 associatedtherewith, each associated catch 110 being positioned near to therecessed position of one handle 102 on an exterior of the upper wall oran exterior of one of the vertically-oriented sidewalls of the enclosure104. By “near” what is meant is that it is located closer to theassociated handle 102 than to other elements of the enclosure 104, suchas other handles 102, interlocks, bays, etc. Furthermore, disengaging acatch 110 releases the associated handle 102 for transition from therecessed position to the extended position.

Furthermore, the handles 102 may be positioned in the recessed positionfor any reason, including shipping and for installation into the rack106.

The one or more catches 110 may be positioned on an exterior surface ofthe enclosure 104 at any location where they are able to be accessed byan installer, such as on a sidewall, exterior surface of the upper wall,and/or rear end of the exterior of the enclosure 104 facing away fromthe rack 106. In an alternate embodiment, the one or more catches 110may be positioned on an interior surface (near bays for installation ofcomponents 108 therein) of the enclosure 104 at any location where theyare able to be accessed by an installer, such as on a sidewall, uppersurface, and/or lower surface of an interior of the enclosure 104. Inthis embodiment, one or more components 108 must be removed prior tobeing able to access at least one catch 110 for deployment of at leastone handle 102, which may force an installer to remove components 108prior to installation and/or removal of the enclosure 104 into/from therack 106.

In another embodiment, the one or more catches 110 may be positioned onone or more sidewalls of the enclosure 104 close (within 5 inches) to arear end of the enclosure 104 facing away from the rack 106 wheninstalled. In this way, two handles 102 positioned at an extreme rearend of the enclosure 104 on or within the vertically-oriented sidewallsof the enclosure 104 may be deployed by disengaging the one or morecatches 110 early in the removal process, thereby allowing the handles102 to be used in the rest of the removal process, instead of simplygripping the exterior of the enclosure 104. This provides immediateaccess to the handles 102 upon beginning to remove the enclosure 104from the rack 106.

The one or more catches 110 may be configured to transition the handles102 upward or outward from the enclosure 104 from the recessed positionto the extended position for use according to any conceivabletransition, such as via flipping, rotating, extending, etc., and may beaided by biasing of the handles 102 toward the extended position, suchas via a conventional spring, spring-leaf arrangement, gear system,ratchet system, etc.

In one embodiment, as shown in FIG. 2, one or more of the handles 102may extend vertically along one of the vertically-oriented sidewalls ofthe enclosure 104 when transitioning from the recessed position 202 tothe extended position 204. These handles 102 may have a slim profile inthe width direction so that they do not occupy much space in theenclosure 104 when in the recessed position 202, which may cause theenclosure 104 to lose space capable of storing more components 108therein. In the extended position 204, the handles 102 extend upwardfrom the enclosure 104 such that they may be grasped by an installer'shands.

In another embodiment, the handles 102 may have a conventional profilesuitable for grasping with hands, and may be located about the enclosure104 at a position where they do not interfere with placement ofcomponents 108 therein.

The handles 102 may comprise any suitable material which has asufficient strength for supporting the weight of the enclosure 104assuming that the enclosure 104 is completely filled with components.For example, the handles 102 may comprise a metal, a composite, aplastic, or some combination thereof. Exemplary metals include carbonand alloys thereof (machined) such as steel, aluminum and alloys thereof(cast or machined), magnesium and alloys thereof, titanium and alloysthereof (cast or machined), etc. Other materials may include carbonfiber, resin composite materials, etc.

In an alternate embodiment, as shown in FIGS. 3A-3B, one or more of thehandles 102 may flip out or rotate from sides of the enclosure 104.These handles 102 may be positioned upside-down when in the recessedposition 302, and then flip upward (not shown), rotate 180° (as shown inFIG. 3B) into the right-side up position for use in the extendedposition 304, be positioned sideways on an upper surface of theenclosure 104 and then flip upward (as shown in FIG. 3A), be positionedright side up in a slot 306 of the enclosure 104 and then slide orextend upward (as shown in FIG. 3C), etrc. In all of these embodiments,an installer may need to disengage the one or more catches 110 prior tothe handles 102 being deployed into the extended position 304.Furthermore, the one or more catches 110 may operate a biasing (such asspring-loaded mechanism) of the handles 102 which deploys themautomatically upon disengaging the one or more catches 110, or thehandles 102 may simply be released so that they may be manually extendedinto position for use.

The handles 102 allow for better grip when lifting the enclosure 104 outof any packaging in which it is shipped and/or stored since aninstaller's hands are not being interfered with by any packaging locatedto the side of the enclosure 104 when lifting the enclosure 104 up andout of the packaging.

Furthermore, as shown in FIG. 4A, an internal interlock system 402 maybe physically configured to prevent the handles 102 from being deployedinto the extended position when there are components 108 installedwithin the enclosure 104. In this embodiment, the enclosure 104comprises one or more interlocks (such as in an interlock system 402),each interlock or latch 406 preventing transition of one or more handles102 associated therewith from the recessed position to the extendedposition when a component 108 is installed in at least one bay of theenclosure 104.

This interlock system 402 may be integrated with the catch 110 thatprevents release of the handles 102, such that the interlock system 402may prevent the catch 110 from being disengaged. The interlock system402 may be positioned near to the location of one or more of the handles102 (closer to the handle 102 than to other elements of the enclosure104), at a location within one or more bays of the enclosure 104, on apanel or surface of the enclosure 104, etc. The interlock system 402comprises a mechanism that is configured to be actuated when a componentis installed in at least one of bay of the enclosure 104, and may be ofa type known in the art.

In one embodiment, as shown in FIG. 4A, an integrated interlock system402 may rely on a single latch 406 which causes the interlock system 402to prevent deployment of any of the handles 102 when any component 108is installed in the enclosure 104. In another embodiment, multiplelatches 406 may be present within one or more bays of the enclosure 104,and may prevent deployment of a handle 102 associated with the bay inwhich the latch 406 is installed. This is intended to prevent deploymentof the associated handle 102 to the extended position when any component108 is installed in a bay associated with a latch 406 in the enclosure104. However, removal of one, several, or all components 108 fromassociated bays allows one or more associated handles 102 to bedeployable. In another embodiment, the single latch 406 may slidesideways when a component 108 is inserted into the enclosure 104 into aposition which restricts any of the handles 102 from being deployed. Inother embodiments, the single latch 406 may move upward, downward, into,or out from the enclosure 104 when a component is inserted therein.

In yet another embodiment, as shown in FIG. 4B, the interlock system 402may comprise individual latches 404 for each bay of the enclosure 104,with each individual latch 404 being separately releasable (so that anassociated handle 102 may be deployed) upon a component 108 beingremoved from the bay associated with the individual latch 404. Inanother embodiment, each of the individual latches 404 may need to bereleased prior to any of the handles 102 being deployed. The interlocksystem 402 may communicate with the one or more catches 110 such thatthe interlock system 402 may prevent disengaging the catch 110 when anycomponent 108 is installed in the enclosure 104.

In another embodiment, one interlock or latch 404 is associated witheach bay of the enclosure 104 with each interlock or latch 404 beingconfigured to prevent transition of at least one handle 102 from therecessed position to the extended position when a component 108 isinstalled in the associated bay of the enclosure 104.

In any of the embodiments described herein, the interlock system 402,interlock 404, and/or interlock 406 may comprise armatures, sliders,sliding bars, latches, tabs, and any other members suitable for enablingthe interlock system 402 to restrict extension of one or more of thehandles 102 when a component 108 is stored in the enclosure 104.Furthermore, the interlock system 402 may be of any type that would beknown to one of skill in the art upon reading the present disclosure.

Now referring to FIGS. 5A-5C, a process for transitioning at least oneof the handles 102 from a recessed position to an extended position inan enclosure 104 having an interlock system 402 is shown, according toone embodiment. As shown in FIG. 5A, when a component 108 is installedin the enclosure 104 in a bay which is associated with a catch 110, thiscatch 110 (and possibly more catches 110) are not able to be actuated toextend the handle 102 because the interlock system 402, and specificallyone or more of the interlocks or latches 404, are still engaged by oneor more of the installed components 108.

FIGS. 5A-5C illustrate this process when removal of one component 108causes one catch 110 to become capable of being actuated; however, inother approaches, one, some, or all components 108 may need to beremoved prior to actuation of one or more catches 110 becoming possible.

As shown in FIG. 5B, removal of the component 108 closest to the catch110 is performed, thereby freeing up the bay adjacent to the catch 110and disengaging the interlock or latch 404.

Then, as shown in FIG. 5C, the catch 110 is now capable of beingactuated. The actuation of the catch 110 releases one or more handles102 (only one handle 102 is shown, but as described previously multiplehandles 102 and/or multiple catches 110 may be present). As shown, themiddle component 108 is still present; however, removal of allcomponents 108 may be required to actuate the one or more catches 110 insome approaches. In these approaches, the one or more handles 102 wouldnot be able to be extended when this component 108 was still installedin the enclosure 104, regardless of how many other components 108 wereremoved.

According to one embodiment, a handle system may be provided that allowsan installer's hands to be positioned closer to the center of theenclosure as opposed to near the edges. Also, most conventional handlesare available at any time to the installer, regardless of the weightthat is loaded into the enclosure. To date, no handle systems known inthe industry have an interlock that prevents the enclosure's lifthandles from being accessed when there is excessive weight in theenclosure. Accordingly, several advantages are provided by the handlesystems described herein according to various embodiments.

While various embodiments have been described above, it should beunderstood that they have been presented by way of example only, and notlimitation. Thus, the breadth and scope of an embodiment of the presentinvention should not be limited by any of the above-described exemplaryembodiments, but should be defined only in accordance with the followingclaims and their equivalents.

What is claimed is:
 1. A system, comprising: an enclosure configured tobe removable from a rack system, the enclosure comprising: at least onebay for insertion of a component therein; a horizontally-oriented upperwall; a horizontally-oriented lower wall; two vertically-orientedsidewalls coupled to the upper and lower walls; and a set of integratedhandles, each handle being configured to transition from a recessedposition to an extended position, and each handle being configured to begripped by a hand when in the extended position, wherein each handle isconfigured to extend higher than the upper wall of the enclosure when inthe extended position, wherein each handle is configured to retract towithin an outer profile of the enclosure when in the recessed position,wherein each handle is configured to rotate 180° from the recessedposition to the extended position, and wherein each handle is orientedupside down when in the recessed position.
 2. The system as recited inclaim 1, wherein four of the handles are located near corners of theupper wall of the enclosure, with two of the handles being positionedwithin or on an exterior of each of the vertically-oriented sidewalls ofthe enclosure when in the recessed position.
 3. The system as recited inclaim 1, wherein the enclosure further comprises one or more catches,each catch being associated with at least one of the handles andconfigured to release the one or more associated handles, wherein theone or more associated handles are restricted from transitioning fromthe recessed position to the extended position until the associatedcatch is disengaged.
 4. The system as recited in claim 3, wherein the atleast one handle is biased toward the extended position such thatdisengaging the associated catch while the at least one handle is in therecessed position causes the at least one handle to transition to theextended position.
 5. The system as recited in claim 4, wherein the atleast one handle is biased toward the extended position with aspring-loaded mechanism.
 6. The system as recited in claim 3, whereineach of the handles has one or more catches associated therewith, eachassociated catch being positioned near to the recessed position of onehandle on an exterior of the upper wall or an exterior of one of thevertically-oriented sidewalls of the enclosure, wherein disengaging thecatches releases the associated handle.
 7. The system as recited inclaim 3, wherein each catch includes a button which is configured todisengage upon being depressed in order to release the one or morecorresponding handle.
 8. The system as recited in claim 1, wherein theenclosure further comprises one or more interlocks, each interlock beingphysically configured to prevent transition of one or more handlesassociated therewith from the recessed position to the extended positionwhen a component is installed in at least one bay of the enclosure. 9.The system as recited in claim 8, wherein one or more interlocks areassociated with each bay of the enclosure with each interlock beingconfigured to prevent the transition of the one or more handles.
 10. Thesystem as recited in claim 1, wherein the outer profile of the enclosureis defined as a maximum possible side-to-side width and top-to-bottomheight of the enclosure that allows for the enclosure to fit into astall of the rack system.
 11. The system as recited in claim 1, whereintwo of the handles are positioned at an extreme rear end of theenclosure on or within the vertically-oriented sidewalls of theenclosure to provide immediate access to the handles upon beginning toremove the enclosure from the rack system.